Related Experiment Videos
Human G protein gamma(11) and gamma(14) subtypes define a new functional subclass.
E A Balcueva1, Q Wang, H Hughes
1Henry Hood M.D. Research Program, Pennsylvania State University College of Medicine, Danville, Pennsylvania, 17822, USA.
Experimental Cell Research
|June 6, 2000
Summary
Two novel gamma subunits, gamma(11) and gamma(14), were identified in mammals. These subunits, while related to gamma(1), show distinct expression and functions beyond retinal phototransduction.
Area of Science:
- Molecular Biology
- Cellular Signaling
Background:
- The mammalian gamma subunit family comprises at least 12 members.
- Sequence conservation divides the family into three subclasses based on homology and function.
Purpose of the Study:
- Identify and characterize two new gamma subunits: gamma(11) and gamma(14).
- Investigate their expression patterns and functional roles.
Main Methods:
- Amino acid sequence analysis for phylogenetic classification.
- Expression pattern analysis.
- Biochemical property assessment.
Main Results:
- Gamma(11) and gamma(14) subunits are closely related to gamma(1) and share biochemical properties, suggesting classification into Class I.
- Despite phylogenetic similarity, gamma(1), gamma(11), and gamma(14) exhibit distinct expression patterns.
- Gamma(11) and gamma(14) represent a new subgroup of farnesylated gamma subunits expressed outside the retina.
Conclusions:
- Class I of the gamma subunit family warrants further subdivision due to distinct expression and signaling functions.
- Gamma(11) and gamma(14) subunits possess non-phototransduction functions and are expressed in non-retinal tissues.